On Monday, a Copenhagen Police spokesperson released new information regarding the investigation into the disappearance of Kim Wall, a Swedish journalist who had been last seen aboard the UC3 Nautilus—the crowd-funded, amateur-built diesel-electric submarine designed and piloted by Peter Madsen. Madsen now confirms that Wall died aboard the submarine, and that he dumped her body overboard. But he claimed to police and prosecutors that her death was accidental.

Details of the investigation had been sealed (protected under the “closed doors” provisions of Danish law), as the criminal investigation is still underway. But after a request from both prosecutors and Madsen’s defense attorney, the court allowed the police department to release the following statement:

The defendant has explained to the police and the Court, that there was an accident on board which caused Kim Wall’s death and that he consequently buried her at sea at a non-defined location in the Bay of Køge. Copenhagen Police may additionally disclose that the preliminary charge of manslaughter is upheld. As the investigation of the case is still covered by “closed doors,” no further information can be given.

Madsen continues to be held on charges of involuntary manslaughter, as the investigation continues.